Initial Setup: Check for OS updates
The release installer ISOs will not be updated w/ the latest security updates (i.e. 2022.1.1 will not get its own ISO). Once the OS is installed and the user connects to the internet, we should check for & install updates ASAP.
Blocked on #13, since this will be one of those "dynamic pages" that is either skipped entirely, returns an extra page (the installing progress), or continues normally